Paul Mackerras <pau...@samba.org> writes: > This frees up bits 57-63 in the Linux PTE on 64-bit Book 3S machines. > In the 4k page case, this is done just by reducing the size of the > RPN field to 39 bits, giving 51-bit real addresses. In the 64k page > case, we had 10 unused bits in the middle of the PTE, so this moves > the RPN field down 10 bits to make use of those unused bits. This > means the RPN field is now 3 bits larger at 37 bits, giving 53-bit > real addresses in the normal case, or 49-bit real addresses for the > special 4k PFN case.
Is it ok to have different real address bits between 4k and 64k linux config ? -aneesh _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
